Home / 20,869.92-28,800.36-11,921.04

Finding the Fourth Proportional to 20,869.92, 28,800.36 and 11,921.04

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Solution

The fourth proportional to 20,869.92, 28,800.36 and 11,921.04 is: 16,450.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.92 : 28,800.36 = 11,921.04 : x
  2. Step 2: Convert to fraction form
    20,869.92/28,800.36 = 11,921.04/x
  3. Step 3: Cross multiply
    20,869.92x = 28,800.36 × 11,921.04
  4. Step 4: Simplify right side
    20,869.92x = 343,330,243.57
  5. Step 5: Solve for x
    x = 343,330,243.57/20,869.92
  6. Step 6: Final answer
    x = 16,450.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.